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AirScience Ferrachel - Model II -Iron Chelate Process System
The process is recommended for reduction of high hydrogen sulfide concentrations (>1000ppmv) to concentrations of less than 100ppmv. To achieve hydrogen sulfide concentrations in the less than 4ppmv, a second stage consisting of a dry scrubbing catalyst will be required.
The process consists in passing the hydrogen sulfide charged biogas through a series of mass transfer towers where the proprietary iron chelate liquor will interact with the hydrogen sulfide and remove it from the gas phase.
The spent liquor is then processed in a liquor regeneration tower where the iron chelate liquor is regenerated and the sulfur precipitated as elemental sulfur which will then be separated by filtration.
The process operates at atmospheric pressure, at ambient temperature and has no liquid discharge. The only process discharge is the sulfur cake which has a certain humidity content.
The process operates continuously and only requires a periodical inspection and cleaning of some internal components to ensure optimum efficiency and performance.
